Rhodamine dye tracer addition to Redfish Lake, Idaho (USA)

Red rhodamine WT dye added to the inflow of Redfish Lake, Idaho, to determine where the inflowing water inserts into the water column. On this date (mid-October), the cold, dense, inflowing water plunged to 12 m (40') before it flowed out in a very narrow layer into the lake's metalimnion.